Ore separator of alternate-current electromagnet



Nov. 2 1926.

M. Koizumi ORE SEPARATOR 0E' ALTERNATE CURRENT ELECTROMAGNET Filed March 19, 1925 2 Sheets-Sheet 1 ,NVE N TOR'. V/V/suo Koizumi ATTORNEY Nov. 2 1926.

M. KOIZUMI ORE SEPARATOR OF ALTERNATE CURRENT EYLECTROMAGNET m VE'NTORQ Mf/'suo /q/'zldm/ ATTGRNEY Patented Nv.2,1926. A n 1,605,117

UNITED STATES PATENT OFFICE.

MITSUO KOIZUMI, 0F ANSI-IAN, CHINA, ASSIGNOR 'lO MINAMI MANSI-IU' TETSUDO KABUSHIKI KAISI-IA, OF DAIREN, KWANGr-TUNG, MANCI-IURIA, CHINA.

ORE SEPARATOR OF ALTERNATE-CURRENT ELECTR.O1\!IA(=`r1\FEI.k Application filed March 19, 1925. Serial No. 16,604.

This invention relates to a machine for se` instead of a round one and an angular water lccting and separating useful minerals from vessel instead of a cylindrical one, and powdered lores by means of a rotating, or Fig. 6 is a side section thereof. shifting, magnetic field caused. by polyphase In the figures, (1) is a wooden water vesalternate electric current, and the object sel (this vessel may preferably be made with thereof is to avoid the disadvantages of sepainsulating substance such as pottery) dirators of this kind hitherto in use and to obvided into three parts, the uppermost of tain high grade concentrates by means of av which is a hopper (2), the next is an ore comparatively simple machine. Separating chamber (3), and the lowest is l0 My invention consists in this that powagain divided into three, of which (l) is`a dered ore is charged in a hopper, and by the tailings chamber, (5) a middlings chamber, action of a rotating, or shifting (shifting in and (6) a concentrates chamber. Between a straight line), magnetic field produced by the hopper (2) and separating chamber (3), polyphase alternating electric current, `the there are a fixed bottom (7) and a movable particles of the mineral are given revolving bottom (8), and an opening (9) between motion, and are attracted by the iron core these bottoms is adjusted by a screw (10) by which has the greatest attraction, thus sepa` moving the movable bottom (8). Above the 70 rating high grade concentrates from tailseparating chamber (3), there is a water ings. According' to my invention, there is pipe (11) along the side wall perforated 2U no necessity of mechanically revolving the with numerous small holes, which project machine, as in the case of machines hitherto water in the direction as shown in Fig. l. in use, and in magnetic separators in which Just below this water pipe 11, the separating 75 direct current electricity is used, there is .a chamber is provided with an annular indrawback of tailings being attracted tocllnedv shelf 12, and below said shelf with a gether with mineral particles, while accordplurality of annular inclined bafiies or deing to my invention, the magnetic field, by fiectors 14 superposed one above another, the

imparting rotation to every particle of min baffles being spaced from the wall of the 80 eral, causes such particles to be thoroughly separating chamber so as to form an annular separated from the tailings. Thus not only channel 13 between the Lipper edges of the high grade concentrates can easily be obbaffles and the wall of the chamber. As tained but there is no necessity of demagnetshown in the drawings the baiiles are inizing them as before. Moreover, the invenclined downwardly toward the center of the 85 tion possesses the additional advantage of Chamber, at such an angle that impurities rendering unnecessary the provision of a di- Contained in the ore will slide by gravity on rect current generator for obtaining direct the baffles toward the center of the chamber. current electricity. It will be noted that the baffles are succes- The accompanying figures show a few exsively narrower toward the lower end of the 90 amples for carrying my invention into pracseparating chamber.. By reason of this contice, of which struction, the impurities that fall down from Fig. 1 is a vertical front section of an al-v one baffle do not fall upon the next lower ternating current magnetic ore separator of one, but will be directed away therefrom.

wet system, and In the inner circumference of the baffles 95 Fig. 2 a plan thereof, half in section. a large number of thm plate pieces (15) are Fig. 3 is a vertical front section of a mod inserted at a suitable angle with the radius.

ified form of my invention for obtaining In order to fill up the central space of the more refined concentrates by repeatino` the separating chambers (3) a cylinder (16) is process of separating mineral from tailings. inserted, and around the separating chamber 10o Fig. 4 is a vertical front section of another (3), there is provided a field magnet (17) to modification of my4 invention, in which arcproduce a rotary magnetic field, the contary magnetic field is provided within a wastruction of which magnet is the same as theV ter vessel. stator of a polyphase induction motor, that Fig. 5 is a section of yet another modiiiis, it consists of an iron core of numerous 105 cation in which a flat magnetic field is used thin plates piled one upon another, and the inner circumference of this iron core is cut into numerous grooves in which a coil is regularly wound. These are enclosed with in an outer casing (20) and a cover (21), and are supported upon supports (22).

According to my invention ore is dressed as follows l Powdered ore mixed with a suitable amount of water is fed into the hopper (2). rihen it passes by its own weight in'to the separating chamber throughthe open-A ing (9), and by the action of the water spouting from the pipe (11), the ore flows toward the center over the shelf (i2), the ore and water being given a rotary motion by the thin pieces (15) which act something like vanes of a water wheel, and falling down around and along the surface of the cylinder (16). At the same time, the particles of pure mineral in the ore, being acted upon by the rotating magnetic field caused by the poly/phase electricity vwhich iiows through the coil, rotate one by one, thus being well separated from tailings, and attracted to the wall of the water vessel, the tailings havingno property to be attracted by magnetism, but having the tendency to collect toward the centre, will fall down from the bailles.

1n other words, the concentrates before reaching the wall strike against the thin pieces (15) and are separated from the tailings, which slide down the baffles by their own weight and fall down therefrom, while the concentrates, being attracted by the magnetism, roll upward against the inclination of the baiiles in the direction opposite to that of the rotating magnetic iield. This rotating motion imparts to the water revolving motion and thus assists the separation of concentrates from tailings, thus the concentrates which reach the wall of the water vessel are very pure, and fall down revolving along the channel (13) by their own weight and enter intopthe concentrate chamber (6), the next purest into the middlings chamber (5), while the impurities and those falling from the inner edges of the bailles fall into the tailings chamber r1`he whole are discharged through passages (23), (2e) and (25) outside of the water vessel.

ln the modification shown in Fig. 8, the ore is repeatedly separated and purer concentrates are obtained. For this purpose, a water pipe (26) and a water shelf (27), similar in construction to (11) and (12) described before, are litted at the middle part of the separating chamber, and also a shelf (28) to lead tailings falling from the upper separating chamber to the lower separating chamber; Then the concentrates which fall down on the water shelf (27) are made to rotate inwardly by the water spouting from the water pipe (26), and are furbut as shown in Fig. i

ther separated in the lower separating chamber.

1n this invention it is not necessary to provide an iron core to produce a rotating magnetic field outside of the water vessel, i., a separating chamber (3) may be provided around an electromagnet (127) of a construction like a wound coil rotor of an induction motor.

also, in this invention the use of a circular iron core which produces a rotating magnetic iield is not necessary, but as shown in Figs. 5 and 6 a flat field magnet (1T) may be used, and a shifting magnetic field caused thereby may be utilized to fulfill the same object. v

r1`he above description refers to a wet system in which water is used, but it goes without saying that this invention can be used with a dry system.

Claims?- 1. An ore separator, comprising in combination, a separating chamber provided interiorly thereof with a plurality of annular inclined bailies spaced from the wall of sait chamoer thereby to form an annular chan nel between said wall and the upper edges of the balies, a receiving chamber below said separating chamber and in communication with said channel, and electrical moans disposed contiguous to the wall of said chamber for producing a rotating magnetic field thereby to impart rotary motion to mineral particles and cause them to travel upward on the baiiles and fall into said channel.

2. An ore separator, comprising in combination, a separating chamber provided interiorly thereof with a plurality of annular inclined battles spaced from the wall of said chamber thereby to form an annular channel between said wall and the upper edges of the battles, a receiving chamber below said separating chamber and in comn'iunication with said channel, and a polyphase alternating-currcnt electromagnet disposed contiguous to the wall of said chamber for producing a rotating magnetic lield thereby to impart rotary motion to mineral particles and cause them to travel upward on the baffles and fall into said channel.

3. An ore separator, comprising in combination, a separating chamber provided interiorly thereof with a plurality of annular inclined bailles spaced from the wall of said chamber thereby to form an annular channel between said wall and the upper edges of the battles, said battles being superposed relatively to each other and each succeeding baille toward the lower end of the chamber being narrower than the preceding one, a receiving chamber below said separating chamber and in communication with said channel, and electrical means disposed contiguous to the wall of said chamber for producing a rotating magnetic field thereby to impart rotary motion to mineral particles and cause them to travel upward on the battles and fall into said channel.

4.. An ore separator, comprising in combination, a separating chamber provided interiorly thereof with a plurality of annular inclined baiiies spaced from the wall of said chamber thereby to form an annular channel between said wall and the upper edges of the baffles, a plurality of plates sceured in the inner peripheries of said baiiies, said plates being inclined in a direction opposite to that of the baflies, a receiving chamber below saidseparating chamber and in communication with said channel, and electrical means disposed contiguous to the wall of said chamber for producing a rotating magnetic field thereby to impart rotary .motion to mineral particles and cause them to travel upward on the baflies and fall into said channel.

5. An ore separator, comprising in combination, a separating chamber provided interiorly thereof with a plurality of annular inclined ballles spaced from the wall of said chamber thereby to form an annular channel between said wall and the upper edges of the bali-les, a hopper above and in communication with said separating chamber, adjustable means for limiting the communication between the hopper and said chamber, a. receiving chamber below said separating chamber and in communication with said channel, and electrical means disposed contiguous to the wall of said chamber for producing a rotating magnetic iield thereby to impart rotary motion to mineral particles and cause them to travel upward on the baffles and fall into said channel.

6. A n ore separator, comprising in combination, a separating chamber provided adjacent to its upper end with an inclined annular shelf, a hopper disposed above said chamber and adapted to deliver ore on to said shelf, a water supply pipe disposed adjacent to the wall of said chamber above said shelf and provided with a plurality of perforations adapted to direct jets of water toward the lower edge of the shelf, a plurality of superposed, inclined, annular baffles disposed Within said chamber in spaced relation to the wall thereof thereby to provide an annular channel between said wall and the upper edges of said bali-les, a receiving chamber below said separating chamber and in communication with said channel, and a polyphase alternatingcurrent electromagnet disposed in contiguous relation to the wall of said chamber for producing a rotating magnetic field thereby to impart rotary motion to mineral particles and cause them to travel upward on the baffles and fall into said channel.

7. An ore separator, comprising in combination, a separating chamber provided adjacent to its upper end with an inclined annular shelf, a hopper disposed above said chamber and adapted to deliver ore on to said shelf, means for directing said ore toward the lower edge of the shelf, a plurality of superposed, inclined, annular baffies disposed below said shelf in spaced relation to the wall of the chamber thereby to provide an annular channel between said wall and the upper edges of said baiiies, each succeeding baiiie toward the lower end of the chamber being narrower than the preceding one, a plurality of plates secured in the inner peripheries of said baffles, said plates being inclined in a direction opposite to that of the bail-les, a polyphase alternating-current electromagnet disposed in contiguous relation to the wall of said chamber for producing a rotating magnetic field thereby to impart rotary motion to mineral particles and cause them to travel `upward on the baiiles and fall into said channel, a receiving chamber below said separating chamber and in communication with said channel for receiving said mineral particles, a middlings receiving chamber below said separating chamber, and a tailings receiving chamber valso disposed below said separating chamber, said tailings and middlings receiving chambers being closed to said channel but communicating with the central opening between the baffles.

In testimony whereof I name to this speciiication.

MITSUO KOIZUMI.

have signed my 

